Spring Thaw in Alberta

May 2, 2014
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Last week I had the great pleasure of flying to Alberta for the Edmonton and Calgary user group meetings. Well, let me say that it mostly a great pleasure... my system was still in a bit of temperature shock having been sunning myself on a St. Lucian b...
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Count large chunk of data in Python

April 30, 2014
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This post was kindly contributed by DATA ANALYSIS - go there to comment and to read the full post. The line-by-line feature in Python allows it to count hard disk-bound data. The most frequently used data structures in Python are list and dictionary. Many cases the dictionary has advantages since it is a basically...
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Example 2014.5: Simple mean imputation

April 25, 2014
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We're both users of multiple imputation for missing data. We believe it is the most practical principled method for incorporating the most information into data analysis. In fact, one of our more successful collaborations is a review of software for ...
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Example 2014.4: Hilbert Matrix

April 14, 2014
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Rick Wicklin showed how to make a Hilbert matrix in SAS/IML. Rick has a nice discussion of these matrices and why they might be interesting; the value of H_{r,c} is 1/(r+c-1). We show how to make this matrix in the data step and in R. We also show t...
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R Continues Its Rapid Growth

April 7, 2014
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R Continues Its Rapid Growth

This post was kindly contributed by r4stats.com » SAS - go there to comment and to read the full post. I’ve just updated the section below from The Popularity of Data Analysis Software. Note that the overall article is still under construction and all the figure numbers have changed from previous versions. n Growth...
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10 popular Linux commands for Hadoop

April 6, 2014
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This post was kindly contributed by DATA ANALYSIS - go there to comment and to read the full post. The Hadoop system has its unique shell language, which is called FS. Comparing with the common Bash shell within the Linux ecosystem, the FS shell has much fewer commands. To deal with the humongous size of...
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SAS vs. Python for data analysis

March 27, 2014
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To perform data analysis efficiently, I need a full stack programming language rather than frequently switching from one language to another. That means — this language can hold large quantity of data, manipulate data promptly and easily (e.g. if-then-else; iteration), connect to various data sources such as relational database and Hadoop, apply some statistical...
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SAS Metadata Security Testing

March 18, 2014
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SAS® Global Forum 2014 is now only a few days away, and I’m excited (and a little nervous) about presenting my paper Test for Success: Automated Testing of SAS® Metadata Security Implementations. Update 03Apr2014: My paper is now available for download from the SAS Global Forum 2014 Online Proceedings. SAS metadata security testing is...
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Spring has Sprung in Saskatchewan

March 13, 2014
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As I sit here in the Regina airport, I'm looking out the window with longing like a puppy at the pet store. The weather here is just beautiful: + temperatures and clear skies and the sound of the running water resulting from the melt-off of the snow is...
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